Acetylene-terminated ethylene oxide tetrahydrofuran copolyether containing carbamic acid ester units and synthesis method thereof

A technology of alkynyl-terminated oxirane tetrahydrofuran copolyether and hydroxyl-terminated oxirane tetrahydrofuran copolyether, which is applied in the field of alkynyl-terminated oxirane tetrahydrofuran copolyether and its synthesis, and can solve the problem of polytriazole fracture elongation Low-level problems, to achieve the effect of improving mechanical properties
CN106366306AInactive Publication Date: 2017-02-01XIAN MODERN CHEM RES INST
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
XIAN MODERN CHEM RES INST
Publication Date
2017-02-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an acetylene-terminated ethylene oxide tetrahydrofuran copolyether containing carbamic acid ester units. The structural formula is shown in the picture I. A synthesis process includes the steps that 1, propargyl alcohol reacts with an excessive amount of toluene-2,4-diisocyanate, and then propargyl (3-isocyanate group-4-methyl) phenyl carbamate is obtained; 2, propargyl (3-isocyanate group-4-methyl) phenyl carbamate and terminal hydroxyl ethylene oxide tetrahydrofuran copolyether generate the acetylene-terminated ethylene oxide tetrahydrofuran copolyether containing the carbamic acid ester units through an additive reaction. The acetylene-terminated ethylene oxide tetrahydrofuran copolyether containing the carbamic acid ester units has a specific chain structure, is free of side reactions, and is applied to a polytriazole elastomer so that the polytriazole elastomer can have excellent mechanical properties.
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Description

technical field

[0001] The invention relates to an alkynyl-terminated oxirane tetrahydrofuran copolyether containing carbamate units and a synthesis method thereof. The compound can be used as a binder for composite solid propellants and belongs to the technical field of polymer materials. Background technique

[0002] Binder is an important component of solid propellant. It acts as a skeleton and matrix to bind oxidizer, metal aluminum powder, plasticizer and other additive components together, so that the propellant formula has certain geometric shape and mechanical properties. Hydroxyl-terminated polybutadiene (HTPB) propellants and hydroxyl-terminated polyether (HTPE) propellants, which are widely used in weaponry at present, are both cured by hydroxyl-terminated prepolymers and isocyanates at a certain temperature to form polyurethane elastomers. The reaction system is sensitive to moisture, and the moisture in the environment and raw materials will cause a series of si...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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